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25th July 2017

The venue for Society meetings has changed and the directions to it given on p. 126 of the July 2017 issue are incorrect. Meetings are held at the Hall of St. Botolph’s Church, Bishopsgate, London EC2M 3TL. The Hall is set in a small garden behind the church, less than 2 minutes’ walk from Liverpool St. mainline and underground stations.

The key 1.Rf1! threatens 2.Sf5# with the variations 1...e3 2.Se2#, and
1...Qc8 2.Qd6#
Thus, the try-threat 2.Se2# recurs as the post-key mate in the line 1.Rf1 e3
2.Se2#, whilst the try-mate 2.Sf5# recurs as the threat in the post-key phase. This
is similar to the le Grand theme, which we saw last week, but not the same — in the
le Grand proper, the threat and mate are reciprocally changed after the same
defence in different phases, whereas here the change occurs after different
defences (1...Rc2 and 1...e3). For that reason, the effect we have in this problem
is known as a Pseudo le Grand.

Any comments or questions on this problem should be addressed to
Steve Giddins, our Librarian and Archivist, using the 'Contact'
item in the menu on the left.